technically more traction in the wet - better handling but bigger wider wheels will cause more rolling road resistance this may or may not refect in mpg / acceleration slightly?
Having said that being in a front end crash at 50-40mph down a deep ditch in the dark round a blind right hand bend in the wet in a k11=====X
- i will keep the 15" on who knows the better braking / traction may save my life?
